Publicado Por En julio 31, 2026 I laser cut these 28 tooth chain rings. They are made from stainless steel with a brushed finish. Made to fit 1/2"x1/8" chains. They are .112" thick, (+- .002") They are for the Ashtabula style cranks, the kind of crank found on old Schwinns or the very common one piece crank on cruiser bikes, and some older BMX bikes. I am not a big bike company or some mass producing factory in Asia. These are cut in Southwest Missouri, USA. I guarantee your satisfaction. Check out my other stuff for more sprocket options.